UPDATE: Police are looking for the driver who they say caused a multi-vehicle crash in Georgia Thursday morning. 

Investigators tell Channel 3 the woman was seen walking away from the scene of the crash on I-75 northbound and the car she was driving was reported stolen last week.

Thursday's morning commute was a slow one for drivers making their way from Georgia into Tennessee by I-75 because of the crash. 

The six vehicles involved including an overturned semi snarled traffic for about three hours just before the Tennessee line. 

Georgia State Patrol says it all started with a white Mercury Mountaineer SUV.

"The driver failed to maintain their lane striking a tractor-trailer. The tractor-trailer lost control, traveled off the roadway and overturned," GSP Trooper Brian Dedmon said.

But it's what the woman driving the SUV did after the crash that has John Grider scratching his head. He saw the crash unfold in front of him and stopped to help. 

"I looked, I noticed a lady was walking, carrying her purse like she was going shopping. Strutin' along the far side of the freeway. I'm like, what the heck? When that got told to me, I was like, why would you leave the scene of an accident? I don't understand people these days now," he said. 

He's amazed no one was hurt in the crash, especially the driver of the semi, who didn't want to go on camera but did tell Channel 3 she was coming from Atlanta carrying a load of nails. 

They did not spill, making clean up easier for crews. 

She's thankful for the good Samaritans like Grider who stopped to help in her time of need. 

"It felt right. You know, if I was in the same situation I would hope there would be another Good Samaritan out there who would do the same thing. Not just drive by, ya know?" Grider added. 

If you have any information that can help Georgia State Patrol in their investigation, call *GSP. 

PREVIOUS STORY: Interstate 75 northbound has re-opened to traffic after a morning crash that involved multiple-vehicles and an overturned semi Thursday between Cloud Springs Road and Ringgold Road.

GDOT tells Channel 3 that five cars and a tractor-trailer are part of the crash. Georgia State Patrol says there were no injuries.

The driver of one of the vehicles left the scene on foot, and police are looking for the person. The Georgia State Patrol tells Channel 3 that the vehicle was stolen from Chattanooga October 13. The driver, a woman, is still at large.

Traffic was backed up southward for several miles to Three Notch Road. Catoosa County deputies were on scene, helping to direct traffic. 

Drivers should use an alternate route if possible until a normal traffic flow resumes.